Stephen Tobolowsky was tapped to play the Tool Time co-host, Glen. However, he was still busy with a movie that was in the middle of production at the time the first pilot was to be shot. Therefore, the producers set out to cast an alternate character that would stand in as Tim's co-host for the pilot, or for however many episodes were required until Tobolowsky was available. The casting department auditioned Richard Karn, for what would be his first major appearance on a TV sitcom; the character of Al Borland was created from there. After the first few episodes completed with Patricia Richardson as Jill, Tobolowsky was still tied up with his other commitments, and Karn found himself in his role permanently when Tobolowsky decided he would have no time to do a series. Thus, the character of Glen never came into being. House Painting
Tool Time was conceived as a parody of the PBS home-improvement show This Old House.[6] Tim and Al are caricatures of the two principal cast members of This Old House, host Bob Vila and master carpenter Norm Abram.[7] Al Borland has a beard and always wears plaid shirts when taping an episode, reflecting Norm Abram's appearance on This Old House.[8] Bob Vila appeared as a guest star on several episodes of Home Improvement, while Tim Allen and Pamela Anderson both appeared on Bob Vila's show Home Again.[9][10] House Painting
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